Fixing a typo in README.md and removing unusual import/variables in propeller.py

Author: ggurioli

README.md

@@ -49,7 +49,7 @@ See the [**Examples**](#examples) section below and the [**Tutorials**](tutorial
 **BladeX** is compatible with Python 3.6. Moreover, some of the modules require `OCC` to be installed for the `.iges` or `.stl` CAD generation. This requirement cannot be satisfied through `pip`, but the precompiled binaries are available on `conda` using the command:
 
 ```bash
-conda install -c conda-forge pythonocc-core=7.4.0
+> conda install -c conda-forge pythonocc-core=7.4.0
 ```
 
 You can also refer to `pythonocc.org` or `github.com/tpaviot/pythonocc-core` for further instructions.

bladex/propeller.py

@@ -1,13 +1,9 @@
 """
 Module for the propeller with shaft bottom-up parametrized construction.
 """
-import os
 import numpy as np
-from bladex import Blade, Shaft
-import OCC.Core.TopoDS
-from OCC.Core.gp import gp_Dir, gp_Pnt, gp_Ax1, gp_Trsf
-from OCC.Core.IGESControl import IGESControl_Reader, IGESControl_Writer
-from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_Transform, BRepBuilderAPI_Sewing
+from OCC.Core.IGESControl import IGESControl_Writer
+from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_Sewing
 from OCC.Core.BRepAlgoAPI import BRepAlgoAPI_Fuse
 from OCC.Extend.DataExchange import write_stl_file
 from OCC.Display.SimpleGui import init_display
@@ -46,7 +42,6 @@ def __init__(self, shaft, blade, n_blades):
         boolean_union = BRepAlgoAPI_Fuse(self.shaft_solid, blades_combined)
         boolean_union.Build()
         result_compound = boolean_union.Shape()
-        section_edges = boolean_union.SectionEdges()
         sewer = BRepBuilderAPI_Sewing(1e-2)
         sewer.Add(result_compound)
         sewer.Perform()